<template>
  <div id="aCoursesList" class="bg-fa of">
    <!-- /课程列表 开始 -->
    <section class="container">
      <header class="comm-title">
        <h2 class="fl tac">
          <span class="c-333">全部课程</span>
        </h2>
      </header>
      <section class="c-sort-box">
        <section class="c-s-dl">
          <dl>
            <dt>
              <span class="c-999 fsize14">课程类别</span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li v-for="(item,index) in subjectNestedList" :key="index" :class=" {active:oneIndex==index}">
                  <a :title="item.title"
                     @click="searchOne(item.id, index)" href="#">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <dl>
            <dt>
              <span class="c-999 fsize14"></span>
            </dt>
            <dd class="c-s-dl-li">
              <ul class="clearfix">
                <li v-for="(item,index) in subSubjectList" :key="index" :class="{active:oneIndex==index}">
                  <a :title="item.title"
                     @click="searchTwo(item.id, index)" href="#">{{item.title}}</a>
                </li>
              </ul>
            </dd>
          </dl>
          <div class="clear"></div>
        </section>
        <div class="js-wrap">
          <section class="fr">
            <span class="c-ccc">
              <i class="c-master f-fM">1</i>/
              <i class="c-666 f-fM">1</i>
            </span>
          </section>
          <section class="fl">
            <ol class="js-tap clearfix">
              <li :class="{'current bg-orange':buyCountSort!==''}">
                <a title="销量"
                   href="javascript:void(0);"
                   @click="searchBuyCount()">销量
                  <span :class="{hide:buyCountSort===''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':gmtCreateSort!==''}">
                <a title="最新" href="javascript:void(0);"
                   @click="searchGmtCreate()">最新
                  <span :class="{hide:gmtCreateSort===''}">↓</span>
                </a>
              </li>
              <li :class="{'current bg-orange':priceSort!==''}">
                <a title="价格" href="javascript:void(0);"
                   @click="searchPrice()">价格&nbsp;
                  <span :class="{hide:priceSort===''}">↓</span>
                </a>
              </li>
            </ol>
          </section>
        </div>
        <div class="mt40">
          <!-- /无数据提示 开始-->
          <section class="no-data-wrap" v-if="data.total==0">
            <em class="icon30 no-data-ico">&nbsp;</em>
            <span class="c-666 fsize14 ml10 vam">没有相关数据，小编正在努力整理 中...</span>
          </section>
          <!-- /无数据提示 结束-->
          <article  v-if="data.total>0"  class="comm-course-list">
            <ul class="of" id="bna">
              <li  v-for="item in data.items" :key="item.id">
                <div class="cc-l-wrap">
                  <section class="course-img">
                    <img :src="item.cover"  class="img-responsive" :alt="item.title">
                    <div class="cc-mask">
                      <a :href="'/course/'+item.id"  title="开始学习" class="comm-btn cbtn-1">开始学习</a>
                    </div>
                  </section>
                  <h3 class="hLh30 txtOf mt10">
                    <a :href="'/course/'+item.id"   :title="item.title"  class="course-title fsize18 c-333">{{item.title}}</a>
                  </h3>
                  <section class="mt10 hLh20 of">
                    <span class="fr jgTag bg-green" v-if="Number(item.price) === 0">
                      <i class="c-fff fsize12 f-fA">免费</i>
                    </span>
                    <span class="fl jgAttr c-ccc f-fA">
                      <i class="c-999 f-fA">{{ item.viewCount }}人学习</i>
                      |
                      <i class="c-999 f-fA">9634评论</i>
                    </span>
                  </section>
                </div>
              </li>

            </ul>
            <div class="clear"></div>
          </article>
        </div>
        <!-- 公共分页 开始 -->
        <div>
          <div class="paging">
            <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="首页"
              @click.prevent="gotoPage(1)">首</a>
            <a
              :class="{undisable: !data.hasPrevious}"
              href="#"
              title="前一页"
              @click.prevent="gotoPage(data.current-1)">&lt;</a>
            <a
              v-for="page in data.pages"
              :key="page"
              :class="{current: data.current == page, undisable: data.current == page}"
              :title="'第'+page+'页'"
              href="#"
              @click.prevent="gotoPage(page)">{{ page }}</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="后一页"
              @click.prevent="gotoPage(data.current+1)">&gt;</a>
            <a
              :class="{undisable: !data.hasNext}"
              href="#"
              title="末页"
              @click.prevent="gotoPage(data.pages)">末</a>
            <div class="clear"/>
          </div>
        </div>

        <!-- 公共分页 结束 -->
      </section>
    </section>
    <!-- /课程列表 结束 -->
  </div>
</template>
<script>
  export default {
    data () {
      return {
        page:1,
        data:{},
        subjectNestedList: [], // 一级分类列表
        subSubjectList: [], // 二级分类列表
        searchObj: {}, // 查询表单对象
        oneIndex:-1,
        twoIndex:-1,
        buyCountSort:"",
        gmtCreateSort:"",
        priceSort:""
      }
      },
      //加载完渲染时
    created () {
      //获取课程列表
      this.initCourse()
      //获取分类
      this.initSubject()
    },
      methods: {
      //查询课程列表
        initCourse(){
          course.getCourseList(1, 8,this.searchObj)
            .then(response => {
              this.data = response.data.data
            })
        },
        //查询所有一级分类
        initSubject(){
          //debugger
          course.getAllSubject()
            .then(response => {
              this.subjectNestedList = response.data.data.items
            })
        },
        //点击一级分类，显示对应的二级分类，查询数据
        searchOne(subjectParentId, index) {
          //debugger
          this.oneIndex = index
          this.twoIndex = -1
          this.searchObj.subjectId = "";
          this.subSubjectList = [];
          this.searchObj.subjectParentId = subjectParentId;
          this.gotoPage(1)
          for (let i = 0; i < this.subjectNestedList.length; i++) {
            if (this.subjectNestedList[i].id === subjectParentId) {
              this.subSubjectList = this.subjectNestedList[i].children
            }
          }
          },
      //点击二级分类，查询数据
        searchTwo(subjectId, index) {
          this.twoIndex = index
          this.searchObj.subjectId = subjectId;
          this.gotoPage(1)
        },
        //购买量查询
      searchBuyCount() {
          this.buyCountSort = "1";
          this.gmtCreateSort = "";
          this.priceSort = "";
          this.searchObj.buyCountSort = this.buyCountSort;
          this.searchObj.gmtCreateSort = this.gmtCreateSort;
          this.searchObj.priceSort = this.priceSort;
          this.gotoPage(1)
      },
      //更新时间查询
      searchGmtCreate() {
          //debugger
        this.buyCountSort = "";
        this.gmtCreateSort = "1";
        this.priceSort = "";
        this.searchObj.buyCountSort = this.buyCountSort;
        this.searchObj.gmtCreateSort = this.gmtCreateSort;
        this.searchObj.priceSort = this.priceSort;
        this.gotoPage(1)
      },
      //价格查询
      searchPrice() {
          this.buyCountSort = "";
          this.gmtCreateSort = "";
          this.priceSort = "1";
          this.searchObj.buyCountSort = this.buyCountSort;
          this.searchObj.gmtCreateSort = this.gmtCreateSort;
          this.searchObj.priceSort = this.priceSort;
          this.gotoPage(1)
      },
  //分页查询
       gotoPage(page) {
          this.page = page
         course.getCourseList(page, 8, this.searchObj)
           .then(response => {
             this.data = response.data.data
           })
        }
    }
  }
</script>
<style scoped>
  .active {
    background: #bdbdbd;
  }
  .hide {
    display: none;
  }
  .show {
    display: block;
  }
</style>

